<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <title>Painting – Background Gradient</title>
    <style>
        body {
            font-family: "Inter", sans-serif;
            margin: 0;
            min-height: 100vh;
            color: #f1f5f9;
            background: radial-gradient(circle at top, #38bdf8, #0f172a 55%);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .card {
            width: 320px;
            padding: 24px;
            border-radius: 20px;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.9), rgba(2, 6, 23, 0.9));
            border: 1px solid rgba(148, 163, 184, 0.3);
            box-shadow: 0 10px 40px rgba(15, 23, 42, 0.4);
        }
        h2 {
            margin-top: 0;
            margin-bottom: 12px;
        }
    </style>
</head>
<body>
    <div class="card">
        <h2>Layered background</h2>
        <p>
            Shows radial and linear gradients stacked with translucency to validate painting order and
            blend behavior.
        </p>
    </div>
</body>
</html>

